JBR-4552 Windows revert back after initial move/resize in Cygwin/X

(cherry picked from commit 6dc194e089)
(cherry picked from commit 9c2eccb07c)

src/java.desktop/unix/classes/sun/awt/X11/XDecoratedPeer.java

@@ -415,6 +415,10 @@ abstract class XDecoratedPeer extends XWindowPeer {
             insets_corrected = true;
             reshape(dimensions, SET_SIZE, false);
         } else if (xe.get_parent() == root) {
+            if (!isReparented()) {
+                // X server on Windows (e.g. Cygwin/X) does perform a no-op reparenting to the root window
+                return;
+            }
             configure_seen = false;
             insets_corrected = false;